#region Licence
// Copyright (c) 2008 James Gregory (james@jagregory.com)
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
// 
//     * Redistributions of source code must retain the above copyright notice,
//     this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above copyright notice,
//     this list of conditions and the following disclaimer in the documentation
//     and/or other materials provided with the distribution.
//     * Neither the name of James Gregory nor the names of its
//     contributors may be used to endorse or promote products derived from this
//     software without specific prior written permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#endregion

using JAGregory.BooPlugin.Language.Members;
using Microsoft.VisualStudio.Package;
using Microsoft.VisualStudio.TextManager.Interop;

namespace JAGregory.BooPlugin.Language
{
    public class BooInlineParser
    {
        private readonly SourceInterrogator sourceInterrogator = new SourceInterrogator();

        public BooScope GetMemberSelectScope(ParseRequest req, Source source)
        {
            BooScope scope = new BooScope();
            BooDeclarations declarations = GetDeclarations(req, source);

            scope.SetDeclarations(declarations);

            return scope;
        }

        private BooDeclarations GetDeclarations(ParseRequest req, Source source)
        {
            int index = GetPositionNumber(req);
            int line = req.Line + 1;
            int column = source.ColumnToVisiblePosition(req.Line, req.Col) + 1;

            MemberDeclarationCollection members = sourceInterrogator.GetRelevantMembers(req.FileName, req.Text, line, column, index);
            BooDeclarations dec = new BooDeclarations(members);

            return dec;
        }

        private int GetPositionNumber(ParseRequest req)
        {
            IVsTextLines front;
            int index = 0;

            req.View.GetBuffer(out front);
            
            front.GetPositionOfLineIndex(req.Line, req.Col, out index);
            
            return --index;
        }
    }
}